Guide to Using the RIBA Plan of Work 2013 - Other - Page 56
Guide to Using the RIBA Plan of Work 2013
It is important to remember that the timing of contractor involvement does not
necessarily dictate the contractor’s responsibilities for design: design and build
forms of procurement allocate all design responsibility to the contractor whereas
traditional contracts result in design responsibility remaining with the designers,
although discrete elements of design responsibility may be allocated to the
contractor (for example, Performance Specified Work in JCT Building Contracts).
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D E SI G N T
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The means of defining Information Exchanges (the information and level of detail
produced at the end of each work stage) is one of the crucial topics to emerge
from the development of the RIBA Plan of Work 2013. The information exchanged
at the end of a stage can vary for good reason. For example, one residential
client may only want a set of drawings for obtaining planning and building
control approvals. Another may want detailed interior designs and full-sized
joinery details. Some may require fly-through videos, models and sophisticated
renderings in order to sign off the Concept Design at Stage 2. For this reason, the
RIBA Plan of Work 2013 advocates that during Stage 1 the Information Exchanges
at the end of each stage are agreed, along with the level of detail to be produced.
The template in Assembling a Collaborative Project Team has been developed
to assist in this process. Aligned with the Schedules of Services, a Design
Programme and the Design Responsibility Matrix, it provides a comprehensive kit
of parts for those undertaking the lead designer role.
AM
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FREQUENTLY
Information Exchanges
What is meant by level of detail?
Although CAD information is produced ‘full size’, it is typically issued or exchanged
as drawings in ‘hard’ (prints) or ‘soft’ (electronic) formats with the level of detail
added to the CAD model dictated by the scale of the output (i.e. 1:100, 1:50, 1:5,
1:2, etc.). BIM changes this approach since such outputs are no longer required
(although it is likely that 2D ‘slices’ through a model will continue to be used as
contractual documents for some time). The level of detail question therefore
progresses from an issue of scale to one of purpose. For example, if the model
is being used for design discussions with a client, one level of detail is required
in the model whereas a model being handed over to a specialist subcontractor
(for example, to develop the curtain walling) requires a different level of detail.
As this transitional subject is in an embryonic state, the Information Exchange
table is conceived in a manner that considers the output scale. The transition to a
digital level of detail is considered further in Chapter 6. An additional complexity
is the correlation between the Design Responsibility Matrix and the Information
Exchanges because the level of detail issued at Stage 4 by the core designers for
work that will be undertaken by a specialist subcontractor, also during Stage 4,
differs from the level of detail required to construct directly on site during Stage 5.
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